Non-existent client service and just plain GREEDY!

It is an absolute disgrace that this company just want to ****** people. I have a Mercedes SL500 and i got a red battery light warning on my dash after steam cleaning the engine. Also the Sensotronic Brake Hold didn't work after that. I have done my research on these issues and everywhere on the web it says the codes can just be cleared/reset with the diagnostic system.. So i called MB Century City and spoke with the workshop manager and asked if they would be kind enough just to clear/reset that code for the battery light. I was told it is not a simple process and not that easy and the car has to be booked in for a full diagnostic process and it will cost me a minimum of R1500 per hour.. rediculous i tell you... I took my car to someone that has an Autel Maxisys scanner and within 5 minutes everything was cleared and all systems were working perfectily and best of all, it did not cost me a cent!.. Shame on Mercedes Century City for there client services and just being plain GREEDY!